package org.apache.maven;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
import org.apache.maven.artifact.resolver.filter.ExclusionSetFilter;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.component.annotations.Requirement;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;

/**
 * @author Jason van Zyl
 * @todo this should probably be a component with some dynamic control of filtering
 */
@Component(role = ArtifactFilterManager.class)
public class DefaultArtifactFilterManager implements ArtifactFilterManager {

  private static final Set<String> DEFAULT_EXCLUSIONS;

  @Requirement
  private PlexusContainer plexus;

  static {
    Set<String> artifacts = new HashSet<String>();

    artifacts.add("classworlds:classworlds");
    artifacts.add("org.codehaus.plexus:plexus-classworlds");
    artifacts.add("org.codehaus.plexus:plexus-component-api");
    artifacts.add("org.codehaus.plexus:plexus-container-default");
    artifacts.add("plexus:plexus-container-default");
    artifacts.add("org.sonatype.spice:spice-inject-plexus");
    artifacts.add("org.sonatype.sisu:sisu-inject-plexus");
    artifacts.add("org.eclipse.sisu:org.eclipse.sisu.plexus");
    artifacts.add("org.apache.maven:maven-artifact");
    artifacts.add("org.apache.maven:maven-aether-provider");
    artifacts.add("org.apache.maven:maven-artifact-manager");
    artifacts.add("org.apache.maven:maven-compat");
    artifacts.add("org.apache.maven:maven-core");
    artifacts.add("org.apache.maven:maven-error-diagnostics");
    artifacts.add("org.apache.maven:maven-lifecycle");
    artifacts.add("org.apache.maven:maven-model");
    artifacts.add("org.apache.maven:maven-model-builder");
    artifacts.add("org.apache.maven:maven-monitor");
    artifacts.add("org.apache.maven:maven-plugin-api");
    artifacts.add("org.apache.maven:maven-plugin-descriptor");
    artifacts.add("org.apache.maven:maven-plugin-parameter-documenter");
    artifacts.add("org.apache.maven:maven-plugin-registry");
    artifacts.add("org.apache.maven:maven-profile");
    artifacts.add("org.apache.maven:maven-project");
    artifacts.add("org.apache.maven:maven-repository-metadata");
    artifacts.add("org.apache.maven:maven-settings");
    artifacts.add("org.apache.maven:maven-settings-builder");
    artifacts.add("org.apache.maven:maven-toolchain");
    artifacts.add("org.apache.maven.wagon:wagon-provider-api");
    artifacts.add("org.eclipse.aether:aether-api");
    artifacts.add("org.eclipse.aether:aether-spi");
    artifacts.add("org.eclipse.aether:aether-impl");
    //
    // We must also filter out the old or NoClassDefFoundErrors will surface
    //
    artifacts.add("org.sonatype.aether:aether-api");
    artifacts.add("org.sonatype.aether:aether-spi");
    artifacts.add("org.sonatype.aether:aether-impl");

    /*
     * NOTE: Don't exclude the wagons or any of their dependencies (apart from the wagon API). This
     * would otherwise provoke linkage errors for wagons contributed by build extensions. We also
     * don't need to exclude the wagons from plugins. Plugins that use wagons directly and declare
     * the corresponding dependency will simply use a wagon from their plugin realm.
     */

    DEFAULT_EXCLUSIONS = Collections.unmodifiableSet(artifacts);
  }

  protected Set<String> excludedArtifacts = new HashSet<String>(DEFAULT_EXCLUSIONS);

  /**
   * @deprecated Use this class as a component instead, and then use getArtifactFilter().
   */
  public static ArtifactFilter createStandardFilter() {
    // TODO: configure this from bootstrap or scan lib
    return new ExclusionSetFilter(DEFAULT_EXCLUSIONS);
  }

  /**
   * Returns the artifact filter for the core + extension artifacts.
   *
   * @see org.apache.maven.ArtifactFilterManager#getArtifactFilter()
   */
  public ArtifactFilter getArtifactFilter() {
    Set<String> excludes = new LinkedHashSet<String>(excludedArtifacts);

    for (ArtifactFilterManagerDelegate delegate : getDelegates()) {
      delegate.addExcludes(excludes);
    }

    return new ExclusionSetFilter(excludes);
  }

  /**
   * Returns the artifact filter for the standard core artifacts.
   *
   * @see org.apache.maven.ArtifactFilterManager#getExtensionDependencyFilter()
   */
  public ArtifactFilter getCoreArtifactFilter() {
    return new ExclusionSetFilter(getCoreArtifactExcludes());
  }

  private List<ArtifactFilterManagerDelegate> getDelegates() {
    try {
      return plexus.lookupList(ArtifactFilterManagerDelegate.class);
    } catch (ComponentLookupException e) {
      return new ArrayList<ArtifactFilterManagerDelegate>();
    }
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.maven.ArtifactFilterManager#excludeArtifact(java.lang.String)
   */
  public void excludeArtifact(String artifactId) {
    excludedArtifacts.add(artifactId);
  }

  public Set<String> getCoreArtifactExcludes() {
    Set<String> excludes = new LinkedHashSet<String>(DEFAULT_EXCLUSIONS);

    for (ArtifactFilterManagerDelegate delegate : getDelegates()) {
      delegate.addCoreExcludes(excludes);
    }

    return excludes;
  }

}
